Rebecca Alie Romijn O'Connell (born November 6, 1972) is an American actress and former model. She is known for her role as Mystique in the original trilogy (2000–2006) of the X-Men film series, as Joan from The Punisher (2004) (both based on Marvel Comics), the dual roles of Laure Ash and Lily Watts in Femme Fatal (2002), and Una Chin-Riley on Star Trek: Discovery (2019) and Star Trek: Strange New Worlds (2022–present). Her other major roles include Eve Baird on the TNT series The Librarians,
